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<html lang="en">

<head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
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    <title>Document</title>
</head>

<body>
    <div id="info"></div>
    <script>
        var info = "<div>hello{{uname}}</div>";
        var uname = "张三";
        var result = info.replace("{{uname}}", uname);
        console.log(result);
        var div = document.querySelector("#info");
        div.innerHTML = result;
    </script>
</body>

</html>